<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/axios/dist/axios.min.js"></script>
</head>
<body>
    <h1>cors跨域</h1>
  <button id="btn">发送请求</button>
  <script>
     const oBtn = document.getElementById('btn');
    //  绑定事件
    oBtn.onclick=function(){
        axios.get('http://127.0.0.1:3030/userInfo',{
            params: {
          userId: "001"
        }
        })
    }
  </script>
</body>
</html>